Nearly Double The Amount Of Cases In 2019 Than Of Any Other Year In The Last Decade

From January 1 to December 5, 2019, 1,276* individual cases of measles have been confirmed in 31 states. CDC will now be updating these data monthly.

This is the greatest number of cases reported in the U.S. since 1992. More than 75% of the cases this year are linked to recent outbreaks in New York. Measles is more likely to spread and cause outbreaks in U.S. communities where groups of people are unvaccinated.

The majority of cases are among people who were not vaccinated against measles.

Measles can cause serious complications. From January 1 – December 5, 2019, 124 of the people who got measles this year were hospitalized, and 61 reported having complications, including pneumonia and encephalitis.

States with Reported Measles 2019 ** (as of December 5, 2019)
The states that have reported cases to CDC are Alaska, Arizona, California, Colorado, Connecticut, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Missouri, Nevada, New Hampshire, New Jersey, New Mexico, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Tennessee, Texas, Virginia, and Washington.

The states that reported outbreaks were California, Georgia, Illinois, Michigan, New Jersey, New York City, New York State, Oregon, Pennsylvania, Texas, and Washington.

All measles cases this year have been caused by measles wild-type D8 or B3.

Spread of Measles

  • The majority of people who got measles were unvaccinated.
  • Measles is still common in many parts of the world.
  • Travelers with measles continue to bring the disease into the U.S.

Measles can spread when it reaches a community in the U.S. where groups of people are unvaccinated.